Find the fourth roots of 81(cos 320° + i sin 320° ). write the answer in trigonometric form.

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

What is the length of the midsegment of a trapezoid with bases of length 15 and 25 ?

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −